External Procedures and Linux

Is there anyone running Oracle 9.2.0.4 on Red Hat AS 3.0 and using =
external procedure calls? I'm having one heck of a time with it & am =
sure I messed something simple up. I use them a lot on HP-UX, but I =
just can't get Linux running, always end up with:

select oracheck_functions.ext_proc_up from dual

*
ERROR at line 1:

ORA-28575: unable to open RPC connection to external procedure agent
ORA-06512: at "SYSTEM.ORACHECK_FUNCTIONS", line 23
ORA-06512: at line 1

Looks like a listener or tnsnames config problem, but those are =
identical to what I use on HP. Any ideas??

Dick Goulet
Senior Oracle DBA
Oracle Certified 8i DBA

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